After spending an uncomfortable evening with Sarah, shy office worker, Jack Thompson finally admits to himself what he has known for a long time, he's in love with his best friend, Lisa. The problem is Lisa already has a boyfriend and seems totally oblivious to how Jack feels about her. In the meantime, Sarah is becoming more and more obsessed with Jack, much to his dismay. But when Lisa suggests spending a weekend with her in London, Jack sees this as the perfect opportunity to declare his love. Whilst they're in the big city, events take a turn for the worse and little does he know it but Jack's life is about to get a lot more complicated.